**do this line by line, not copy & paste in one go (may overrun u-boot):**
````
=> env default -a
## Resetting to default environment
=> setenv ethaddr ba:d0:4a:9c:4e:ce
=> saveenv
Saving Environment to MMC...
Writing to MMC(0)... done
=> reset
````
- this information is saved on the SD card, not some config EEPROM or NVRAM. You will have to redo this step for every SD card.
- The board should come up like so (note change of `Net: eth0: ethernet@ff702000` line):

sudo apt update
sudo apt -y upgrade
````
- resize the image to the actual SD size
````
sudo /opt/scripts/tools/grow_partition.sh
````
- now you're good to try the demo configs
# Rebuilding on target:
for now, you will have to create a swapfile manually like so: